September weather forecast and climate
Clarendon, TX

Weather in September

September, the first month of the autumn, in Clarendon, is still a warm month, with temperature in the range of an average low of 64.6°F (18.1°C) and an average high of 84.7°F (29.3°C).

Temperature

In Clarendon, the average high-temperature in September marginally drops, from a hot 93.6°F (34.2°C) in August, to a moderately hot 84.7°F (29.3°C). The average low-temperature, in September, is 64.6°F (18.1°C).

Heat index

The average heat index in September is calculated to be a hot 87.4°F (30.8°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'feels like', 'apparent temperature', or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (pregnancy, wind, clothing). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

With an average relative humidity of 55%, September is the most humid month.

Rainfall

In Clarendon, during September, the rain falls for 10.7 days and regularly aggregates up to 1.69" (43mm) of precipitation. Throughout the year, there are 88.8 rainfall days, and 14.45" (367mm) of precipitation is accumulated.

Snowfall

In Clarendon, Texas, snow does not fall in May through September.

Daylight

The average length of the day in September is 12.4h.

Sunshine

In September, the average sunshine is 9.1h.

UV index

In Clarendon, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Clarendon?

In September, in Clarendon, the average high-temperature is 84.7°F (29.3°C), and the average low-temperature is 64.6°F (18.1°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in September is calculated to be 87.4°F (30.8°C).

What is the most humid month in Clarendon?

With an average relative humidity of 55%, September is the most humid month in Clarendon.

What is the average humidity in September in Clarendon?

The average relative humidity in September in Clarendon is 55%.

How many days does it rain in September in Clarendon?

In Clarendon, during September, the rain falls for 10.7 days and regularly aggregates up to 1.69" (43mm) of precipitation.

When it does not snow in Clarendon?

In Clarendon, Texas, snow does not fall in May through September.

Does it snow in Clarendon in September?

In Clarendon, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Clarendon have in September?

In September, the average length of the day is 12.4h.

How many hours of sunshine does Clarendon have in September?

The average sunshine in September in Clarendon, Texas, is 9.1h.

How high is the UV index in September in Clarendon?

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV radiation.

Average temperature in September
Clarendon, TX

Average temperature in September - Clarendon, TX
  • Average high temperature in September: 84.7°F

The warmest month (with the highest average high temperature) is July (93.7°F).
The month with the lowest average high temperature is December (51.1°F).

  • Average low temperature in September: 64.6°F

The month with the highest average low temperature is July (72.7°F).
The coldest month (with the lowest average low temperature) is January (32.4°F).

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Average pressure in September
Clarendon, TX

Average pressure in September - Clarendon, TX
  • Average pressure in September: 29.97"

The month with the highest atmospheric pressure is January (30.14").
The month with the lowest atmospheric pressure is June (29.85").

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Average wind speed in September
Clarendon, TX

Average wind speed in September - Clarendon, TX
  • Average wind speed in September: 10.3mph

The windiest month (with the highest average wind speed) is April (13.5mph).
The calmest month (with the lowest average wind speed) is August (9.9mph).

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Average humidity in September
Clarendon, TX

Average humidity in September - Clarendon, TX
  • Average humidity in September: 55%

The month with the highest relative humidity is September (55%).
The month with the lowest relative humidity is April (45%).

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Average rainfall in September
Clarendon, TX

Average rainfall in September - Clarendon, TX
  • Average rainfall in September: 1.69"

The wettest month (with the highest rainfall) is May (2.05").
The driest month (with the least rainfall) is February (0.39").

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Average rainfall days in September
Clarendon, TX

Average rainfall days in September - Clarendon, TX
  • Average rainfall days in September: 10.7 days

The month with the highest number of rainy days is July (11.4 days).
Months with the least rainy days are January and February (3.2 days).

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Average snowfall in September
Clarendon, TX

Average snowfall in September - Clarendon, TX
  • Average snowfall in September: 0"

The month with the highest snowfall is January (1.5").
Months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Clarendon, TX

Average snowfall days in September - Clarendon, TX
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (2.8 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Clarendon, TX

Average daylight in September / Average sunshine in September - Clarendon, TX
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.5h).
The month with the shortest days is December (Average daylight: 9.8h).

  • Average sunshine in September: 9.1h

The month with the most sunshine is June (Average sunshine: 11.6h).
The month with the least sunshine is December (Average sunshine: 6.8h).

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Average sunshine days in September
Clarendon, TX

Average sunshine days in September - Clarendon, TX
  • Average sunshine days in September: 16.9 days

The month with the most sunshine days is January (26.4 days).
The month with the least sunshine days is August (15.4 days).

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Average UV index in September
Clarendon, TX

Average UV index in September - Clarendon, TX
  • Average UV index in September: 5

Months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).

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Average cloud cover in September
Clarendon, TX

Average cloud cover in September - Clarendon, TX
  • Average cloud cover in September: 22

The month with the most cloud cover is April (Cloud cover 24).
The month with the least cloud cover is June (Cloud cover 16).

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Average visibility in September
Clarendon, TX

Average visibility in September - Clarendon, TX
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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